Fuel cell vehicle and control method therefor
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKohei Oda, Yuji Kakeno
Life of this patent
Estimating the term…
Abstract
With a fuel cell vehicle includes a fuel cell and a secondary battery, a drive motor and a pump motor are connected to each other via an electric power line so that the drive motor and the pump motor are capable of receiving and supplying electric power with each other without involving reception and supply of electric power with the secondary battery. The control device determines an upper-limit guard value of torque of the pump motor based on a dischargeable power of the secondary battery and an output power of the fuel cell, or determines a lower-limit guard value of torque of the pump motor based on a chargeable power of the secondary battery and an output power of the fuel cell.
Claims6
A fuel cell vehicle including a fuel cell and a secondary battery, the fuel cell vehicle comprising:
- a drive motor for driving a load;
- a pump for supplying an oxygen-containing gas to the fuel cell;
- a pump motor for driving the pump;
- and
- a control device for controlling operations of the drive motor and the pump motor, wherein
- the drive motor and the pump motor are connected to each other via an electric power line so that the drive motor and the pump motor are configured to receive and supply electric power with each other without involving reception and supply of electric power with the secondary battery, and wherein
- the control device determines:
- (i) an upper-limit guard value of torque of the pump motor based on a dischargeable power of the secondary battery and an output power of the fuel cell;
- or
- (ii) a lower-limit guard value of torque of the pump motor based on a chargeable power of the secondary battery and an output power of the fuel cell.
A control method for a fuel cell vehicle including a fuel cell, a secondary battery, a pump for supplying an oxygen-containing gas to the fuel cell, and a drive motor and a pump motor which are connected to each other via an electric power line so that the drive motor and the pump motor are configured to receive and supply electric power with each other without involving reception and supply of electric power with the secondary battery, the control method comprising the steps of:
- (i) determining an upper-limit guard value of torque of the pump motor based on a dischargeable power of the secondary battery and an output power of the fuel cell, or
- (ii) determining a lower-limit guard value of torque of the pump motor based on a chargeable power of the secondary battery and an output power of the fuel cell;
- and
- controlling the pump motor in response to the upper-limit guard value determined by the step (i) or the lower-limit guard value determined by the step (ii).
Dependencies are inferred from the claim text.